Transcription of UCx84x Current-Mode PWM Controllers - Texas Instruments
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UCx84x Current-Mode PWM Controllers - Texas Instruments
VINUC2843 VCCVREFRT/CTGROUNDCOMPVFBISENSEOUTPUTC opyright 2016, Texas Instruments IncorporatedProductFolderOrderNowTechnic alDocumentsTools &SoftwareSupport &CommunityAn IMPORTANTNOTICEat the end of this datasheetaddressesavailability,warranty, changes,use in safety-criticalapplications,intellectual propertymattersand ,UC2842,UC3842,UC1843,UC2843,UC3843UC184 4,UC2844,UC3844,UC1845,UC2845, uc3845 SLUS223F APRIL1997 REVISEDAPRIL2020 UCx84xCurrent-ModePWM Controllers1 Features11 Optimizedfor off-lineand DC-to-DCconverters Low start-upcurrent(< 1 mA) Automaticfeedforwardcompensation Pulse-by-pulsecurrentlimiting Enhancedload-responsecharacteristics Undervoltagelockoutwith hysteresis Double-pulsesuppression High-currenttotem-poleoutput Internallytrimmedbandgapreference Up to 500-kHzoperation Erroramplifierwith low outputresistance2 Applications Switchingregulatorsof any polarity Transformer-coupledDC-DCconverters3 DescriptionTheUCx84xseriesof controlintegratedcircuitsprovidethe featuresthat are necessaryto implementoff-lineor DC-to-DCfixed-frequencycurrent-modecontr olschemes,with a minimumnumberof undervoltagelockout(UVLO),featuringastar t-upcurrentof lessthan1 mA,and a precisionreferencetrimmedfor accuracyat the ensurelatchedoperation,a pulse-widthmodulation(PWM)comparatorthat alsoprovidescurrent-limitcontrol,anda tot
uc1844, uc2844, uc3844, uc1845, uc2845, uc3845 SLUS223F –APRIL 1997–REVISED APRIL 2020 www.ti.com Product Folder Links: UC1842 UC2842 UC3842 UC1843 UC2843 UC3843 UC1844 UC2844 UC3844 UC1845
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